On Monday, the Northern Fleet also said that the Smolensk, a
Project 949A (Oscar II-class) nuclear-powered attack submarine,
had rejoined the fleet after two years of repairs and upgrading
at the Zvyozdochka shipyard in northern Russia.

Built in 1990, the Smolensk has a length of 155 meters,
displacement of up to 24,000 tons, operating depth of 600 meters,
and maximum submerged speed of 32 knots.